Rationale for the application of the Topocad software package intended for design calculations of route geometry parameters in underground railway construction Источник: https://mining-media.ru/en/articleen/14684-rationale-for-the-application-of-the-topocad-software-package-intended-for-design-calculations-of-route-geometry-parameters-in-underground-railway-construction

2019 ◽  
Vol 144 (2/2019) ◽  
pp. 90-91
Author(s):  
R.V. Shevchuk ◽  
D.Zh. Akmatov ◽  
A.A. Tikhonov
Keyword(s):  
Software Package ◽  
Railway Construction ◽  
Underground Railway ◽  
Design Calculations

scholarly journals О методике проектировочного расчета площади крыла

2020 ◽  
Author(s):  
N.V. Levshonkov ◽  
A.L. Gusev ◽  
A.A. Krylosova
Keyword(s):  
Approximate Solution ◽  
Deep Sea ◽  
Design Problem ◽  
Software Package ◽  
Underwater Vehicles ◽  
Hydrodynamic Forces ◽  
Different Depths ◽  
Design Calculations ◽  
Research Equipment

Буксируемые подводные аппараты в настоящее время актуальны для исследовательских и поисковых работ на различных глубинах. Неоспоримым преимуществом данных аппаратов является работа на обширных областях, а ценность результатов напрямую зависит от сохранения стабилизации носителя исследовательской аппаратуры. Рассматриваются силы с ходового конца троса как причина нарушения стабилизированного положения носителя исследовательской аппаратуры. В работе предложена методика расчета площади крыла глубоководного планирующего аппарата, потребной для получения заданных гидродинамических сил, которые образуются на ходовом конце буксирного троса. Расчет проводится по поляре, которая предполагается известной из проведенных экспериментов. Рассматривается алгоритм, с помощью которого возможно проведение проектировочных расчетов параметров крыла для буксируемых подводных аппаратов. Проверяется сходимость результатов с практической методикой, реализованной в программном комплексе. В результате получен универсальный инструмент дляполучения приближенного решения проектировочной задачи.The towed underwater vehicles are currently used for research and exploration at different depths. The undeniable advantage of these vehicles is the ability to operate in vast areas, and the value of the results directly depends on maintaining the stabilization of the research equipment carrier. The forces from the running end of the cable are considered as the cause of the violation of the stabilized position of the research equipment carrier. The paper proposes a method for calculating the area of a wing of a deep-sea gliding vehicle, required to obtain the specified hydrodynamic forces, which arise at the running end of the towing cable. The calculation is carried out using the polar, which is assumed to be known from the experiments performed. The algorithm used for carring out design calculations of wing parameters for towed underwater vehicles is considered. The procedure implemented in the software package is used to verify the convergence of results with the practice. As a result, a universal tool for getting an approximate solution of a design problem was developed.

Thermo-mechanical behaviour of energy pile in underground railway construction site

2016 ◽  
pp. 83-88 ◽  
Author(s):  
M Adinolfi ◽  
A Mauro ◽  
R Maiorano ◽  
N Massarotti ◽  
S Aversa
Keyword(s):  
Mechanical Behaviour ◽  
Construction Site ◽  
Energy Pile ◽  
Railway Construction ◽  
Underground Railway

Quanitative aspects of electron diffraction using electron holography

1995 ◽  
Vol 53 ◽  
pp. 616-617
Author(s):  
E. Völkl ◽  
L.F. Allard ◽  
B. Frost ◽  
T.A. Nolan
Keyword(s):  
Electron Beam ◽  
Electron Diffraction ◽  
Software Package ◽  
Spatial Coherence ◽  
Electron Holography ◽  
Image Intensity ◽  
Interference Fringes ◽  
Complex Image ◽  
The Difference ◽  
Recorded Image

Off-axis electron holography has the well known ability to preserve the complex image wave within the final, recorded image. This final image described by I(x,y) = I(r) contains contributions from the image intensity of the elastically scattered electrons IeI (r) = |A(r) exp (iΦ(r)) |, the contributions from the inelastically scattered electrons IineI (r), and the complex image wave Ψ = A(r) exp(iΦ(r)) as:(1) I(r) = IeI (r) + Iinel (r) + μ A(r) cos(2π Δk r + Φ(r))where the constant μ describes the contrast of the interference fringes which are related to the spatial coherence of the electron beam, and Φk is the resulting vector of the difference of the wavefront vectors of the two overlaping beams. Using a software package like HoloWorks, the complex image wave Ψ can be extracted.

Computer programs for the calculation of x-ray intensities emitted by elements in multi-layer structures

1990 ◽  
Vol 48 (2) ◽  
pp. 216-217
Author(s):  
G.F. Bastin ◽  
H.J.M. Heijligers ◽  
J.M. Dijkstra
Keyword(s):  
Software Package ◽  
Light Element ◽  
Matrix Correction ◽  
Excellent Performance ◽  
Element Analysis ◽  
X Ray ◽  
Know How ◽  
Accurate Knowledge ◽  
Layer Structures ◽  
Bulk Matrix

For the calculation of X-ray intensities emitted by elements present in multi-layer systems it is vital to have an accurate knowledge of the x-ray ionization vs. mass-depth (ϕ(ρz)) curves as a function of accelerating voltage and atomic number of films and substrate. Once this knowledge is available the way is open to the analysis of thin films in which both the thicknesses as well as the compositions can usually be determined simultaneously.Our bulk matrix correction “PROZA” with its proven excellent performance for a wide variety of applications (e.g., ultra-light element analysis, extremes in accelerating voltage) has been used as the basis for the development of the software package discussed here. The PROZA program is based on our own modifications of the surface-centred Gaussian ϕ(ρz) model, originally introduced by Packwood and Brown. For its extension towards thin film applications it is required to know how the 4 Gaussian parameters α, β, γ and ϕ(o) for each element in each of the films are affected by the film thickness and the presence of other layers and the substrate.

Composite right/left-handed transmission line with array of thermocouples for generating terahertz radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20502
Author(s):  
Behrokh Beiranvand ◽  
Alexander S. Sobolev ◽  
Anton V. Kudryashov
Keyword(s):  
Transmission Line ◽  
Terahertz Radiation ◽  
Transmission Lines ◽  
Software Package ◽  
Optical Pulses ◽  
Capacitively Coupled ◽  
Voltage Difference ◽  
Left Handed ◽  
Microwave Transmission ◽  
Commercial Software Package

We present a new concept of the thermoelectric structure that generates microwave and terahertz signals when illuminated by femtosecond optical pulses. The structure consists of a series array of capacitively coupled thermocouples. The array acts as a hybrid type microwave transmission line with anomalous dispersion and phase velocity higher than the velocity of light. This allows for adding up the responces from all the thermocouples in phase. The array is easily integrable with microstrip transmission lines. Dispersion curves obtained from both the lumped network scheme and numerical simulations are presented. The connection of the thermocouples is a composite right/left-handed transmission line, which can receive terahertz radiation from the transmission line ports. The radiation of the photon to the surface of the thermocouple structure causes a voltage difference with the bandwidth of terahertz. We examined a lossy composite right/left-handed transmission line to extract the circuit elements. The calculated properties of the design are extracted by employing commercial software package CST STUDIO SUITE.

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